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DE3922095A1 - Prodn. of liq. steel - from liq. iron oxide formed by treating metallic foam with high oil content etc., by mixing with pig iron - Google Patents

Prodn. of liq. steel - from liq. iron oxide formed by treating metallic foam with high oil content etc., by mixing with pig iron

Info

Publication number
DE3922095A1
DE3922095A1 DE19893922095 DE3922095A DE3922095A1 DE 3922095 A1 DE3922095 A1 DE 3922095A1 DE 19893922095 DE19893922095 DE 19893922095 DE 3922095 A DE3922095 A DE 3922095A DE 3922095 A1 DE3922095 A1 DE 3922095A1
Authority
DE
Germany
Prior art keywords
iron oxide
iron
steel
liquid
liq
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
DE19893922095
Other languages
German (de)
Inventor
Erich Dipl Ing Klimanek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KLIMANEK MARGARETA
Original Assignee
KLIMANEK MARGARETA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KLIMANEK MARGARETA filed Critical KLIMANEK MARGARETA
Priority to DE19893922095 priority Critical patent/DE3922095A1/en
Priority to ES9001605A priority patent/ES2023553A6/en
Priority to LU87759A priority patent/LU87759A1/en
Priority to FR9008327A priority patent/FR2649414A1/en
Priority to NL9001517A priority patent/NL9001517A/en
Priority to BE9000678A priority patent/BE1002877A6/en
Publication of DE3922095A1 publication Critical patent/DE3922095A1/en
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/56—Manufacture of steel by other methods
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B3/00—General features in the manufacture of pig-iron
    • C21B3/04—Recovery of by-products, e.g. slag
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

Liquid iron oxide made by treating metallic foam having high oil or other impurifier is made directly into liquid steel by partially mixing with liquid pig iron in a converted process. The converter is filled just with liquid iron oxide and carbon and reducing gas used to reduce the melt and produces liquid steel. ADVANTAGE - The iron oxide is reduced by the carbon-rich pig iron and transformed into liquid steel. The converter is operated in the usual fashion with the blasting time being reduced as the liquid iron oxide initiates the carbon burning at an early stage. The blasting phase is also reduced which makes the oxidation of the accompanying element easier to control.

Description

Die Erfindung betrifft ein Verfahren, das aus flüssigen Eisenoxiden, wie sie nach den Verfahren der Patentanmeldungen P 38 41 835.5-24 und P 39 18 817.5 hergestellt werden, eine direkte Stahlherstellung über die Reduktion der Eisenoxide ermöglicht.The invention relates to a method consisting of liquid iron oxides, such as them according to the procedures of patent applications P 38 41 835.5-24 and P 39 18 817.5 are produced, a direct steel production via the Allows reduction of iron oxides.

Bis heute gibt es praktisch keine Verfahrenweise, die über eine Reduktion flüssiger Eisenoxide eine direkte Stahlherstellung möglich macht.To date, there is practically no procedure beyond a reduction liquid iron oxides enables direct steel production.

Nach heutigem Stand der Technik wird der größte Teil der Stahlherstellung über flüssiges Roheisen betrieben, das bei der Reduktion von Eisenerz - Ei­ senoxid - im Hochofenverfahren als "rohes Eisen" dadurch anfällt, weil sich der Reduktionsträger Kohlenstoff beim Reduktionsvorgang zwangsläufig in der sich bildenden Eisenschmelze anreichert.According to the current state of technology, the majority of steel production operated via molten pig iron, which is used in the reduction of iron ore egg Senoxide - in the blast furnace process as "raw iron" because: the reduction carrier carbon inevitably during the reduction process accumulates in the melting iron.

Aus diesem "rohen Eisen", das Roheisen genannt wird, wird über ein Kon­ verterstahlverfahren Stahl hergestellt, indem das Roheisen im Konverter - ein bestimmtes Stahlherstellungsgefäß - mit oxidierender Luft durchblasen wird, so daß hierdurch über Oxidationen der überhöhte Kohlenstoff des Roh­ eisens und andere störende Begleitelemente abgebaut und dadurch unterschied­ liche Stahlqualitäten herstellbar werden.This "raw iron", which is called pig iron, is turned into a con Verterstahlverfahren steel made by the pig iron in the converter - Blow through a certain steel manufacturing vessel - with oxidizing air is, so that this causes the excessive carbon of the raw iron and other disruptive accompanying elements removed and thereby differentiated steel qualities can be produced.

Diese Verfahrensweise stellt keine direkte Stahlherstellung dar, weil die Erz­ reduktion zunächst Roheisen und erst danach eine Stahlherstellung ermög­ licht.This procedure does not constitute direct steel production because the ore first reduction of pig iron and only then steel production possible light.

Viele Versuche zur direkten Stahlherstellung hat es bis heute gegeben, die entweder großtechnisch nicht durchführbar waren oder einem zu hohen Kostenaufwand unterlegen sind.There have been many attempts to produce steel directly to date were either not technically feasible or too high Are inferior to costs.

Letzlich hat man sich darauf beschränkt, in Abwandlung des Hochofenver­ fahrens über bestimmte Begasungsverfahren eine Eisenerzreduktion so zu betreiben, daß man reduziertes Eisen herstellen kann, das, wenn die Ener­ giekosten dieses Verfahrens günstig gestaltet werden können, als Schrottein­ satz bei der Stahlherstellung verwendet wird.Ultimately, it was limited to this, in a modification of the blast furnace drive through certain fumigation processes to iron ore reduction operate that you can produce reduced iron, that if the Ener Giekosten this process can be designed cheaply as a scrap set is used in steel production.

Ein solches Verfahren wird im Patent DE 34 37 913 C2 beschrieben. Dieses Patent verdeutlicht auch, daß, wenn eine flüssige Eisenphase angestrebt wird, dies dann wieder nur die Roheisenphase ist. Such a method is described in patent DE 34 37 913 C2. This Patent also clarifies that when a liquid iron phase is sought, this is just the pig iron phase.  

Der heutige Stand der Technik, so kann gefolgert werden, läßt keine wirt­ schaftliche Verfahrensweise erkennen, die eine direkte Stahlherstellung über die Eisenoxidreduktion möglich macht.The current state of the art, it can be concluded, leaves no host Recognize economic procedures that direct steelmaking through iron oxide reduction.

Diese Aufgabenstellung der direkten und wirtschaftlichen Stahlherstellung über die Eisenoxidreduktion wird aber im Sinne der Erfindung dadurch ge­ löst, daß flüssiges Eisenoxid oder Eisenerz, wie es wirtschaftlich in den oben bekannten Patentanmeldungen hergestellt, zunächst in bekannten Konverter­ verfahren in ausreichenden Mengen dem Roheiseneinsatz zugemischt und diese Mischung in üblicher Weise dem Blasvorgang unterzogen wird.This task of direct and economical steel production About the iron oxide reduction is ge in the sense of the invention dissolves that liquid iron oxide or iron ore as it is economical in the above known patent applications, initially in known converters process mixed in sufficient quantities with the pig iron and this Mixture is subjected to the blowing process in the usual way.

Die Vorteile dieser kombinierten Verfahrensweise sind:The advantages of this combined procedure are:

  • a) Daß die Reduktion der Eisenoxide über das kohlenstoffreiche Roheisen erfolgt und dadurch gleichzeitig die flüssigen Eisenoxide direkt in Stahl umgewandelt werden und dies in größeren Mengen.a) That the reduction of iron oxides over the carbon-rich pig iron takes place and at the same time the liquid iron oxides directly in steel are converted and in larger quantities.
  • b) Auf diese Weise kann das Konverterverfahren ohne Änderungen normal betrieben werden.b) In this way, the converter process can be normal without changes operate.
  • c) Die übliche Blasdauer kann verkürzt werden, weil das flüssige Eisenoxid die angestrebte Kohlenstoffverbrennung des Roheisens früher einleitet.c) The usual blowing time can be shortened because of the liquid iron oxide initiates the desired carbon burning of pig iron earlier.
  • d) Die Blasphase der Eisenoxidverknappung, die im Konverterverfahren durch eine spontane Kohlenstoffverbrennung bedingt ist, vermindert wird, was die gewünschte Oxidation der Begleitelemente während des Blasvorganges erleichtert.d) The blowing phase of the iron oxide shortage, which is caused by the converter process spontaneous carbon combustion is caused, what is reduced the desired oxidation of the accompanying elements during the blowing process facilitated.

Über diese Verfahrensmöglichkeit hinaus kann in Erweiterung folgend ver­ fahren werden, wenn Eisenerz, wie in der Patentanmeldung P 39 18 817.5 beschrieben oder auch in anderen Verfahrensweisen ausreichende Mengen flüssiger Eisenerze herstellbar werden, die dann in benannten Konverterver­ fahren von schädlichen Begleitelementen befreit und durch Durchblasen der flüssigen Eisenoxidschmelze mit Kohlenstoff und reduzierendem Treibgas, beispielsweise Wasserstoff oder sonstige nicht oxidationsfähige Gase, beispiels­ weise Stickstoff oder Argon, soweit reduziert, also von Sauerstoff befreit wird, daß letztlich eine hier bekannte und steuerbare Aufkohlung der Eisen- oder Stahlschmelze eine große Palette von Stahl herstellbar macht.In addition to this process option, the following can be added will drive if iron ore, as in patent application P 39 18 817.5 described or sufficient amounts in other procedures liquid iron ores can be produced, which then in named converterver drive freed from harmful accompanying elements and by blowing the liquid iron oxide melt with carbon and reducing propellant, for example hydrogen or other non-oxidizable gases, for example wise nitrogen or argon, if reduced, that is, freed from oxygen is that ultimately a known and controllable carburization of the iron or molten steel makes a large range of steel producible.

Die Vorteile dieser erweiterten Verfahrensweise sind:The advantages of this expanded approach are:

  • e) Daß vollkommen unabhängig von der Roheisenherstellung über die Nutzung der flüssigen Eisenoxidherstellung und der Reduktion dieser Eisenoxide eine direkte Stahlherstellung aus flüssigen Eisenoxiden ermöglicht wird.e) That is completely independent of the pig iron production over the Use of liquid iron oxide production and the reduction of this Iron oxides a direct steel production from liquid iron oxides is made possible.
  • f) Nach e) könnte die direkte Stahlherstellung so verbilligt werden, daß die heutige Lichtbogenofen-Konkurrenz, die nicht auf der Eisenerzbasis, sondern auf der Schrottbasis, nur noch von der größeren Palette der Qualitätsherstellung ableitbar gemacht werden kann. Was die Planung von Stahlschmelzöfen einfacherer macht, weil dann nicht mehr ein zeitweise billigerer Schrotteinsatz die Roheisenbasis benachteiligt, was letztlich der gesamten Hüttenindustrie dient.f) According to e) the direct steel production could be made so cheap that the today's arc furnace competition that is not based on iron ore,  but on the scrap basis, only from the larger range of Quality manufacturing can be made derivable. What the Planning steel melting furnaces makes it easier because then no more temporarily cheaper scrap use disadvantages the pig iron base, which ultimately serves the entire metallurgical industry.

Bei der beschriebenen Patentverfahrensweise und ihren unterschiedlichen Mög­ lichkeiten wird eine Neuheit geschaffen, die oftmals in aufwendigen Ver­ suchen angestrebt, aber nicht erreicht worden ist. Es ist eine Verfahrenweise, die einfach, aber dennoch eine revolutionierende Erfindung in der Hütten­ technik darstellt!In the described patent procedure and its different possibilities a novelty is created, which is often in complex ver seek sought but has not been achieved. It's a procedure the simple, yet a revolutionary invention in the smelters represents technology!

Abschließend ist hervorzuheben, daß die beschriebene Patentverfahrensweise im Zusammenhang mit den oben benannten Patentanmeldungen zur flüssigen Eisenoxidgewinnung eine Notwendigkeit zur optimalen Nutzung der flüssigen Eisenoxidherstellung darstellt.In conclusion, it should be emphasized that the patent procedure described in connection with the above-mentioned patent applications for liquid Iron oxide extraction is a necessity for optimal use of the liquid Represents iron oxide production.

Claims (2)

1. Verfahren zur Herstellung wiederverwendbarer Produkte aus metal­ lischen Schlämmen mit hohen Ölanhaftungen oder anderen Verunrei­ nigungen, die in metallurgischer Weiterbehandlung aus den flüssigen Eisenoxidprodukten eine direkte Flußstahlherstellung ermöglicht, nach Patent 38 41 835.5-24, dadurch gekennzeichnet, daß das flüssige Eisen­ oxidprodukt teilweise einer Roheisenschmelze im Stahlherstellungskon­ verter zugemischt wird, so daß beim normalen Konverterverfahren nicht nur das Roheisen, sondern auch das zugemischte flüssige Eisenoxid über die Reduktion durch das Roheisen direkt in Flußstahl überführt wird.1. A process for the production of reusable products from metallic sludges with high oil build-up or other impurities, which in direct metallurgical processing from the liquid iron oxide products enables direct mild steel production, according to Patent 38 41 835.5-24, characterized in that the liquid iron oxide product is partially one Pig iron melt is mixed in the steel manufacturing con verter, so that in the normal converter process not only the pig iron, but also the admixed liquid iron oxide is converted directly into mild steel via the reduction by the pig iron. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Stahlherstel­ lungskonverter nur mit flüssigem Eisenoxid gefüllt wird - und das Eisen­ oxid nicht mehr über Roheisen, sondern mit Kohlenstoff und reduzieren­ dem oder indifferentem Treibgas über den entsprechend abgeänderten Konverterblasvorgang reduziert und gleichzeitig auf diese Weise direkt in Flußstahl überführt wird.2. The method according to claim 1, characterized in that the steel manufacturer is only filled with liquid iron oxide - and the iron oxide no longer over pig iron, but with carbon and reduce the or indifferent propellant over the modified one The converter blowing process is reduced and at the same time direct in this way is converted into mild steel.
DE19893922095 1989-07-05 1989-07-05 Prodn. of liq. steel - from liq. iron oxide formed by treating metallic foam with high oil content etc., by mixing with pig iron Ceased DE3922095A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE19893922095 DE3922095A1 (en) 1989-07-05 1989-07-05 Prodn. of liq. steel - from liq. iron oxide formed by treating metallic foam with high oil content etc., by mixing with pig iron
ES9001605A ES2023553A6 (en) 1989-07-05 1990-06-08 Prodn. of liq. steel - from liq. iron oxide formed by treating metallic foam with high oil content etc., by mixing with pig iron
LU87759A LU87759A1 (en) 1989-07-05 1990-06-29 PROCESS FOR THE DIRECT MANUFACTURE OF STEEL AND OTHER FOUNDRY PRODUCTS
FR9008327A FR2649414A1 (en) 1989-07-05 1990-07-02 PROCESS FOR THE DIRECT MANUFACTURE OF STEEL AND OTHER FOUNDRY PRODUCTS
NL9001517A NL9001517A (en) 1989-07-05 1990-07-03 PROCESS FOR THE DIRECT MANUFACTURE OF STEEL AND OTHER MELTING PRODUCTS
BE9000678A BE1002877A6 (en) 1989-07-05 1990-07-03 PROCESS FOR THE DIRECT MANUFACTURE OF STEEL AND OTHER FOUNDRY PRODUCTS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893922095 DE3922095A1 (en) 1989-07-05 1989-07-05 Prodn. of liq. steel - from liq. iron oxide formed by treating metallic foam with high oil content etc., by mixing with pig iron

Publications (1)

Publication Number Publication Date
DE3922095A1 true DE3922095A1 (en) 1991-01-10

Family

ID=6384351

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893922095 Ceased DE3922095A1 (en) 1989-07-05 1989-07-05 Prodn. of liq. steel - from liq. iron oxide formed by treating metallic foam with high oil content etc., by mixing with pig iron

Country Status (6)

Country Link
BE (1) BE1002877A6 (en)
DE (1) DE3922095A1 (en)
ES (1) ES2023553A6 (en)
FR (1) FR2649414A1 (en)
LU (1) LU87759A1 (en)
NL (1) NL9001517A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993017132A1 (en) * 1992-02-28 1993-09-02 Massachusetts Institute Of Technology Process for improving metal production in iron and steelmaking processes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986865A (en) * 1973-05-21 1976-10-19 Klockner-Werke Ag Process for producing steel
DE3240656A1 (en) * 1982-10-07 1984-04-12 Thyssen Edelstahlwerke AG, 4000 Düsseldorf METHOD FOR MELT REDUCING METAL ORE
DE3735506A1 (en) * 1987-12-01 1989-05-03 N Proizv Ob Tulatschermet METHOD FOR STEEL PRODUCTION IN AN OXYGEN BLOW CONVERTER

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3986865A (en) * 1973-05-21 1976-10-19 Klockner-Werke Ag Process for producing steel
DE3240656A1 (en) * 1982-10-07 1984-04-12 Thyssen Edelstahlwerke AG, 4000 Düsseldorf METHOD FOR MELT REDUCING METAL ORE
DE3735506A1 (en) * 1987-12-01 1989-05-03 N Proizv Ob Tulatschermet METHOD FOR STEEL PRODUCTION IN AN OXYGEN BLOW CONVERTER

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Stahl u. Eisen 101, 1981, S. 841-851 *
Stahl u. Eisen 92, 1972, S. 501-518 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993017132A1 (en) * 1992-02-28 1993-09-02 Massachusetts Institute Of Technology Process for improving metal production in iron and steelmaking processes

Also Published As

Publication number Publication date
FR2649414A1 (en) 1991-01-11
ES2023553A6 (en) 1992-01-16
LU87759A1 (en) 1991-02-18
BE1002877A6 (en) 1991-07-09
NL9001517A (en) 1991-02-01

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